GitLab

This makes it less error prone that an embedder would forget to call these methods on their profiles. e.g. WebLayer didn't do it correctly (see r769103).

The one behavior change is to stop calling content::UpdateCorsExemptHeader() for the system network contexts in chrome, cast, and weblayer. This shouldn't be needed because web pages don't request URLs through these network contexts.

Change-Id: I53d8aec24a6b129a1a711df6c8e6168068434807
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2203759
Commit-Queue: John Abd-El-Malek <jam@chromium.org>
Auto-Submit: John Abd-El-Malek <jam@chromium.org>
Reviewed-by: Takashi Toyoshima <toyoshim@chromium.org>
Cr-Commit-Position: refs/heads/master@{#769998}